Geology
Physiology
Invertebrates
Historic Documents
Scrabble Player's Dictionary "D"
100

This mountain system was formed by the Eurasian & Indian tectonic plates ramming into each other

the Himalayas

100

This spongy tissue in most bones is also known as myeloid tissue

Marrow

100

The Portuguese man-of-war has hundreds of these hanging from its main body, some of which may reach 165 feet in length

Tentacles

100

The 1534 Act of Supremacy established this church with Henry VIII at its head

the Church of England

100

"A finger or toe",
5 letters

Digit

200

We lava this molten material from which igneous rock is formed

Magma
200

These act as shock absorbers between the vertebrae

Discs

200

A major garden pest, this shell-less snail cousin needs moisture to live & will dry out in the sunlight

Slugs

200

In 1948 this organization proclaimed the Universal Declaration of Human Rights

the United Nations

200

"A short, simple song",
5 letters

a Ditty

300

This Mideast country has around 16% of all the world's oil reserves, with an estimated 268 billion barrels

Saudi Arabia 

300

In medical speak, it's the calcaneal tendon

Achilles Tendon

300

Served freeze-dried, the Tubifex type of these are a tasty treat for aquarium fish

Worms

300

14 pages & hundreds of names long, this title subject of an Oscar-winning film was put on eBay in 2013

Schindler's List

300

"Japanese radish",
6 letters

Daikon

400

There are various North Poles; some scientists believe this one may move from Canada to Siberia within the next 50 years

Magnetic North Pole

400

To do a neck check, look in the mirror & take a sip of water; a bulge below the Adam's apple but above the collarbone could mean this gland is swollen and not functioning normally

Thyroid

400

In 1983 Louisiana made this lobster relative its state crustacean

Crawfish (Crayfish) 

400

One of the oldest known legal codes is this Babylonian one from around 1760 B.C.

the Hammurabi Code

400

"To search for underground water with a divining rod",
5 letters

Dowse

500

Oceanic islands like Hawaii rise to the surface from the ocean floor; continental islands, like New Guinea, are simply unsubmerged parts of these shallow terraces at the edge of a continent

Continental Shelf

500

Head & neck pain & difficulty opening the jaw may be symptoms of the syndrome known by these 3 initials

TMJ

500

North America has only 4 species of milkweed butterflies, including this "kingly" one known for its migrations

Monarchs

500

Watery charter of mutual support & postwar cooperation jointly declared by Churchill & Roosevelt in 1941

Atlantic Charter

500

8-letter adjective,
"pertaining to a flood"

Diluvian